Arbiter Systems 120A, User Manual

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1 General
1.1 Overview
The Model 120A GNSS Synchronized Clock is a multi-satellite system (GPS, Galileo, GLONASS, BeiDou) timing
source. Designed as an economical solution for reclosers and other enclosed installations, includes a rugged, low-
profile, bulkhead-mount antenna with 5 meters of cable.
The Model 120A has a seventy-two channel receiver, capable of tracking up to 3 satellite constellation systems
simultaneously providing a 100 ns rms accuracy. Two pluggable terminal strip outputs provide IRIG-B
unmodulated, 1 PPS, or Programmable Pulse; software selectable. These outputs are configurable to a 50 ohm
driver or a high capacity driver. The Model 120A comes standard with two communication ports, one RS-232 and
one USB. A SPST relay is also included and is configurable to Out of Lock, Fault, Alarm, Stabilized, or
Programmable Pulse. Low-voltage dc power input a 8 Vdc to + 32 Vdc.
1.2 Equipment Included
1.2.1 Model 120A GNSS Synchronized Clock
Instrument comes with 1 four-position and 4 two-position pluggable terminal strip connectors installed and flange
mounts attached.
1.2.2 Antenna Assembly (AP015700)
An active low-profile, weatherproof GPS patch antenna is included. Designed for bulkhead mounting, the antenna
requires 2.5 to 5.5 Vdc on the TNC connector for power.
1.2.3 Antenna Cable Assembly (CA0034700)
A 5 meter (16 foot) RG-174/U cable is provided to connect the Model 120A to the antenna. The cable is
terminated with a female TNC connector on one end and female F connector on the other end and has a
characteristic impedance of 50 ohms.
1.2.4 Mounting Flanges (HD0089800)
The included mounting flanges (2) are pre-attached.
1.2.5 Input / Output Connectors (CN0019202)
Four 2 position pluggable terminal strip connectors for connecting the power, relay contacts and signal outputs
are pre-attached to the Model 120A.
1.2.6 Input / Output Connectors (CN0019204)
One 4 position pluggable terminal strip connector for connecting serial communication port is pre-attached to the
Model 120A.
1.2.7 Setup Guide (PD0058300)
Brief instructions to get started using the Model 120A.